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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.3 by root, Sun Jul 10 20:07:11 2005 UTC vs.
Revision 1.71 by root, Tue Oct 24 16:35:04 2006 UTC

1#define PERL_NO_GET_CONTEXT 1/* solaris */
2#define _POSIX_PTHREAD_SEMANTICS 1
3
4#if __linux
5# define _GNU_SOURCE
6#endif
7
8#define _REENTRANT 1
9
10#include <errno.h>
2 11
3#include "EXTERN.h" 12#include "EXTERN.h"
4#include "perl.h" 13#include "perl.h"
5#include "XSUB.h" 14#include "XSUB.h"
6 15
16#include "autoconf/config.h"
17
18#include <pthread.h>
19
20#include <stddef.h>
21#include <errno.h>
22#include <sys/time.h>
23#include <sys/select.h>
7#include <sys/types.h> 24#include <sys/types.h>
8#include <sys/stat.h> 25#include <sys/stat.h>
26#include <limits.h>
9#include <unistd.h> 27#include <unistd.h>
10#include <fcntl.h> 28#include <fcntl.h>
11#include <signal.h> 29#include <signal.h>
12#include <sched.h> 30#include <sched.h>
13#include <endian.h>
14 31
15#include <pthread.h> 32#if HAVE_SENDFILE
33# if __linux
34# include <sys/sendfile.h>
35# elif __freebsd
16#include <sys/syscall.h> 36# include <sys/socket.h>
37# include <sys/uio.h>
38# elif __hpux
39# include <sys/socket.h>
40# elif __solaris /* not yet */
41# include <sys/sendfile.h>
42# else
43# error sendfile support requested but not available
44# endif
45#endif
17 46
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 47/* used for struct dirent, AIX doesn't provide it */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 48#ifndef NAME_MAX
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 49# define NAME_MAX 4096
50#endif
21 51
22#if __i386 || __amd64
23# define STACKSIZE ( 256 * sizeof (long))
24#elif __ia64 52#if __ia64
25# define STACKSIZE (8192 * sizeof (long)) 53# define STACKSIZE 65536
54#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55# define STACKSIZE PTHREAD_STACK_MIN
26#else 56#else
27# define STACKSIZE ( 512 * sizeof (long)) 57# define STACKSIZE 16384
28#endif 58#endif
59
60/* buffer size for various temporary buffers */
61#define AIO_BUFSIZE 65536
62
63#define dBUF \
64 char *aio_buf; \
65 LOCK (wrklock); \
66 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
67 UNLOCK (wrklock); \
68 if (!aio_buf) \
69 return -1;
29 70
30enum { 71enum {
31 REQ_QUIT, 72 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 73 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 74 REQ_READ, REQ_WRITE, REQ_READAHEAD,
75 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 76 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 77 REQ_FSYNC, REQ_FDATASYNC,
78 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
79 REQ_READDIR,
80 REQ_LINK, REQ_SYMLINK,
81 REQ_GROUP, REQ_NOP,
82 REQ_BUSY,
36}; 83};
37 84
85#define AIO_REQ_KLASS "IO::AIO::REQ"
86#define AIO_GRP_KLASS "IO::AIO::GRP"
87
38typedef struct aio_cb { 88typedef struct aio_cb
89{
39 struct aio_cb *volatile next; 90 struct aio_cb *volatile next;
40 91
41 int type; 92 SV *data, *callback;
42 93 SV *fh, *fh2;
43 int fd; 94 void *dataptr, *data2ptr;
95 Stat_t *statdata;
44 off_t offset; 96 off_t offset;
45 size_t length; 97 size_t length;
46 ssize_t result; 98 ssize_t result;
99
100 STRLEN dataoffset;
101 int type;
102 int fd, fd2;
103 int errorno;
47 mode_t mode; /* open */ 104 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 105
53 Stat_t *statdata; 106 unsigned char flags;
107 unsigned char pri;
108
109 SV *self; /* the perl counterpart of this request, if any */
110 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 111} aio_cb;
55 112
113enum {
114 FLAG_CANCELLED = 0x01,
115};
116
56typedef aio_cb *aio_req; 117typedef aio_cb *aio_req;
118typedef aio_cb *aio_req_ornot;
57 119
120enum {
121 PRI_MIN = -4,
122 PRI_MAX = 4,
123
124 DEFAULT_PRI = 0,
125 PRI_BIAS = -PRI_MIN,
126 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127};
128
129static int next_pri = DEFAULT_PRI + PRI_BIAS;
130
58static int started; 131static int started, wanted;
59static int nreqs; 132static volatile int nreqs;
133static int max_outstanding = 1<<30;
60static int respipe [2]; 134static int respipe [2];
61 135
136#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
137# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
138#else
139# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
140#endif
141
142#define LOCK(mutex) pthread_mutex_lock (&(mutex))
143#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
144
145/* worker threasd management */
146static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
147
148typedef struct worker {
149 /* locked by wrklock */
150 struct worker *prev, *next;
151
152 pthread_t tid;
153
154 /* locked by reslock, reqlock or wrklock */
155 aio_req req; /* currently processed request */
156 void *dbuf;
157 DIR *dirp;
158} worker;
159
160static worker wrk_first = { &wrk_first, &wrk_first, 0 };
161
162static void worker_clear (worker *wrk)
163{
164 if (wrk->dirp)
165 {
166 closedir (wrk->dirp);
167 wrk->dirp = 0;
168 }
169
170 if (wrk->dbuf)
171 {
172 free (wrk->dbuf);
173 wrk->dbuf = 0;
174 }
175}
176
177static void worker_free (worker *wrk)
178{
179 wrk->next->prev = wrk->prev;
180 wrk->prev->next = wrk->next;
181
182 free (wrk);
183}
184
62static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 185static pthread_mutex_t reslock = AIO_MUTEX_INIT;
63static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 186static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
64static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 187static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
65 188
66static volatile aio_req reqs, reqe; /* queue start, queue end */ 189/*
67static volatile aio_req ress, rese; /* queue start, queue end */ 190 * a somewhat faster data structure might be nice, but
191 * with 8 priorities this actually needs <20 insns
192 * per shift, the most expensive operation.
193 */
194typedef struct {
195 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
196 int size;
197} reqq;
68 198
69static void *aio_proc(void *arg); 199static reqq req_queue;
200static reqq res_queue;
70 201
71static void 202int reqq_push (reqq *q, aio_req req)
72start_thread (void)
73{ 203{
74 sigset_t fullsigset, oldsigset; 204 int pri = req->pri;
75 pthread_t tid;
76 pthread_attr_t attr;
77
78 pthread_attr_init (&attr);
79 pthread_attr_setstacksize (&attr, STACKSIZE);
80 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
81
82 sigfillset (&fullsigset);
83 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
84
85 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
86 started++;
87
88 sigprocmask (SIG_SETMASK, &oldsigset, 0);
89}
90
91static void
92send_req (aio_req req)
93{
94 nreqs++;
95
96 pthread_mutex_lock (&reqlock);
97
98 req->next = 0; 205 req->next = 0;
99 206
100 if (reqe) 207 if (q->qe[pri])
101 { 208 {
102 reqe->next = req; 209 q->qe[pri]->next = req;
103 reqe = req; 210 q->qe[pri] = req;
104 } 211 }
105 else 212 else
106 reqe = reqs = req; 213 q->qe[pri] = q->qs[pri] = req;
107 214
108 pthread_cond_signal (&reqwait); 215 return q->size++;
109 pthread_mutex_unlock (&reqlock);
110} 216}
111 217
112static void 218aio_req reqq_shift (reqq *q)
113end_thread (void)
114{ 219{
115 aio_req req; 220 int pri;
116 New (0, req, 1, aio_cb);
117 req->type = REQ_QUIT;
118 221
119 send_req (req); 222 if (!q->size)
120}
121
122static void
123read_write (pTHX_
124 int dowrite, int fd, off_t offset, size_t length,
125 SV *data, STRLEN dataoffset, SV *callback)
126{
127 aio_req req;
128 STRLEN svlen;
129 char *svptr = SvPV (data, svlen);
130
131 SvUPGRADE (data, SVt_PV);
132 SvPOK_on (data);
133
134 if (dataoffset < 0)
135 dataoffset += svlen;
136
137 if (dataoffset < 0 || dataoffset > svlen)
138 croak ("data offset outside of string");
139
140 if (dowrite)
141 {
142 /* write: check length and adjust. */
143 if (length < 0 || length + dataoffset > svlen)
144 length = svlen - dataoffset;
145 }
146 else
147 {
148 /* read: grow scalar as necessary */
149 svptr = SvGROW (data, length + dataoffset);
150 }
151
152 if (length < 0)
153 croak ("length must not be negative");
154
155 Newz (0, req, 1, aio_cb);
156
157 if (!req)
158 croak ("out of memory during aio_req allocation");
159
160 req->type = dowrite ? REQ_WRITE : REQ_READ;
161 req->fd = fd;
162 req->offset = offset;
163 req->length = length;
164 req->data = SvREFCNT_inc (data);
165 req->dataptr = (char *)svptr + dataoffset;
166 req->callback = SvREFCNT_inc (callback);
167
168 send_req (req);
169}
170
171static void
172poll_wait ()
173{
174 if (!nreqs)
175 return; 223 return 0;
176 224
225 --q->size;
226
227 for (pri = NUM_PRI; pri--; )
228 {
229 aio_req req = q->qs[pri];
230
231 if (req)
232 {
233 if (!(q->qs[pri] = req->next))
234 q->qe[pri] = 0;
235
236 return req;
237 }
238 }
239
240 abort ();
241}
242
243static void req_invoke (aio_req req);
244static void req_free (aio_req req);
245
246/* must be called at most once */
247static SV *req_sv (aio_req req, const char *klass)
248{
249 if (!req->self)
250 {
251 req->self = (SV *)newHV ();
252 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
253 }
254
255 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
256}
257
258static aio_req SvAIO_REQ (SV *sv)
259{
260 MAGIC *mg;
261
262 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
263 croak ("object of class " AIO_REQ_KLASS " expected");
264
265 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
266
267 return mg ? (aio_req)mg->mg_ptr : 0;
268}
269
270static void aio_grp_feed (aio_req grp)
271{
272 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
273 {
274 int old_len = grp->length;
275
276 if (grp->fh2 && SvOK (grp->fh2))
277 {
278 dSP;
279
280 ENTER;
281 SAVETMPS;
282 PUSHMARK (SP);
283 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
284 PUTBACK;
285 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
286 SPAGAIN;
287 FREETMPS;
288 LEAVE;
289 }
290
291 /* stop if no progress has been made */
292 if (old_len == grp->length)
293 {
294 SvREFCNT_dec (grp->fh2);
295 grp->fh2 = 0;
296 break;
297 }
298 }
299}
300
301static void aio_grp_dec (aio_req grp)
302{
303 --grp->length;
304
305 /* call feeder, if applicable */
306 aio_grp_feed (grp);
307
308 /* finish, if done */
309 if (!grp->length && grp->fd)
310 {
311 req_invoke (grp);
312 req_free (grp);
313 }
314}
315
316static void poll_wait ()
317{
177 fd_set rfd; 318 fd_set rfd;
319
320 while (nreqs)
321 {
322 int size;
323#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
324 LOCK (reslock);
325#endif
326 size = res_queue.size;
327#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
328 UNLOCK (reslock);
329#endif
330
331 if (size)
332 return;
333
178 FD_ZERO(&rfd); 334 FD_ZERO(&rfd);
179 FD_SET(respipe [0], &rfd); 335 FD_SET(respipe [0], &rfd);
180 336
181 select (respipe [0] + 1, &rfd, 0, 0, 0); 337 select (respipe [0] + 1, &rfd, 0, 0, 0);
338 }
182} 339}
183 340
184static int 341static void req_invoke (aio_req req)
185poll_cb (pTHX) 342{
343 dSP;
344
345 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
346 {
347 errno = req->errorno;
348
349 ENTER;
350 SAVETMPS;
351 PUSHMARK (SP);
352 EXTEND (SP, 1);
353
354 switch (req->type)
355 {
356 case REQ_READDIR:
357 {
358 SV *rv = &PL_sv_undef;
359
360 if (req->result >= 0)
361 {
362 int i;
363 char *buf = req->data2ptr;
364 AV *av = newAV ();
365
366 av_extend (av, req->result - 1);
367
368 for (i = 0; i < req->result; ++i)
369 {
370 SV *sv = newSVpv (buf, 0);
371
372 av_store (av, i, sv);
373 buf += SvCUR (sv) + 1;
374 }
375
376 rv = sv_2mortal (newRV_noinc ((SV *)av));
377 }
378
379 PUSHs (rv);
380 }
381 break;
382
383 case REQ_OPEN:
384 {
385 /* convert fd to fh */
386 SV *fh;
387
388 PUSHs (sv_2mortal (newSViv (req->result)));
389 PUTBACK;
390 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
391 SPAGAIN;
392
393 fh = SvREFCNT_inc (POPs);
394
395 PUSHMARK (SP);
396 XPUSHs (sv_2mortal (fh));
397 }
398 break;
399
400 case REQ_GROUP:
401 req->fd = 2; /* mark group as finished */
402
403 if (req->data)
404 {
405 int i;
406 AV *av = (AV *)req->data;
407
408 EXTEND (SP, AvFILL (av) + 1);
409 for (i = 0; i <= AvFILL (av); ++i)
410 PUSHs (*av_fetch (av, i, 0));
411 }
412 break;
413
414 case REQ_NOP:
415 case REQ_BUSY:
416 break;
417
418 default:
419 PUSHs (sv_2mortal (newSViv (req->result)));
420 break;
421 }
422
423
424 PUTBACK;
425 call_sv (req->callback, G_VOID | G_EVAL);
426 SPAGAIN;
427
428 FREETMPS;
429 LEAVE;
430 }
431
432 if (req->grp)
433 {
434 aio_req grp = req->grp;
435
436 /* unlink request */
437 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
438 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
439
440 if (grp->grp_first == req)
441 grp->grp_first = req->grp_next;
442
443 aio_grp_dec (grp);
444 }
445
446 if (SvTRUE (ERRSV))
447 {
448 req_free (req);
449 croak (0);
450 }
451}
452
453static void req_free (aio_req req)
454{
455 if (req->self)
456 {
457 sv_unmagic (req->self, PERL_MAGIC_ext);
458 SvREFCNT_dec (req->self);
459 }
460
461 SvREFCNT_dec (req->data);
462 SvREFCNT_dec (req->fh);
463 SvREFCNT_dec (req->fh2);
464 SvREFCNT_dec (req->callback);
465 Safefree (req->statdata);
466
467 if (req->type == REQ_READDIR)
468 free (req->data2ptr);
469
470 Safefree (req);
471}
472
473static void req_cancel (aio_req req)
474{
475 req->flags |= FLAG_CANCELLED;
476
477 if (req->type == REQ_GROUP)
478 {
479 aio_req sub;
480
481 for (sub = req->grp_first; sub; sub = sub->grp_next)
482 req_cancel (sub);
483 }
484}
485
486static int poll_cb ()
186{ 487{
187 dSP; 488 dSP;
188 int count = 0; 489 int count = 0;
490 int do_croak = 0;
189 aio_req req; 491 aio_req req;
190
191 {
192 /* read and signals sent by the worker threads */
193 char buf [32];
194 while (read (respipe [0], buf, 32) > 0)
195 ;
196 }
197 492
198 for (;;) 493 for (;;)
199 { 494 {
200 pthread_mutex_lock (&reslock); 495 LOCK (reslock);
496 req = reqq_shift (&res_queue);
201 497
202 req = ress;
203
204 if (ress) 498 if (req)
205 { 499 {
206 ress = ress->next; 500 if (!res_queue.size)
207 if (!ress) rese = 0; 501 {
502 /* read any signals sent by the worker threads */
503 char buf [32];
504 while (read (respipe [0], buf, 32) == 32)
505 ;
506 }
208 } 507 }
209 508
210 pthread_mutex_unlock (&reslock); 509 UNLOCK (reslock);
211 510
212 if (!req) 511 if (!req)
213 break; 512 break;
214 513
215 nreqs--; 514 --nreqs;
216 515
217 if (req->type == REQ_QUIT) 516 if (req->type == REQ_QUIT)
218 started--; 517 started--;
518 else if (req->type == REQ_GROUP && req->length)
519 {
520 req->fd = 1; /* mark request as delayed */
521 continue;
522 }
219 else 523 else
220 { 524 {
221 int errorno = errno;
222 errno = req->errorno;
223
224 if (req->type == REQ_READ) 525 if (req->type == REQ_READ)
225 SvCUR_set (req->data, req->dataoffset 526 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
226 + req->result > 0 ? req->result : 0);
227 527
528 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
529 SvREADONLY_off (req->data);
530
228 if (req->data) 531 if (req->statdata)
229 SvREFCNT_dec (req->data);
230
231 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
232 { 532 {
233 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 533 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
234 PL_laststatval = req->result; 534 PL_laststatval = req->result;
235 PL_statcache = *(req->statdata); 535 PL_statcache = *(req->statdata);
236
237 Safefree (req->statdata);
238 } 536 }
239 537
240 PUSHMARK (SP); 538 req_invoke (req);
241 XPUSHs (sv_2mortal (newSViv (req->result)));
242 539
243 if (req->type == REQ_OPEN)
244 {
245 /* convert fd to fh */
246 SV *fh;
247
248 PUTBACK;
249 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
250 SPAGAIN;
251
252 fh = POPs;
253
254 PUSHMARK (SP);
255 XPUSHs (fh);
256 }
257
258 PUTBACK;
259 call_sv (req->callback, G_VOID | G_EVAL);
260 SPAGAIN;
261
262 if (req->callback)
263 SvREFCNT_dec (req->callback);
264
265 errno = errorno;
266 count++; 540 count++;
267 } 541 }
268 542
269 Safefree (req); 543 req_free (req);
270 } 544 }
271 545
272 return count; 546 return count;
273} 547}
274 548
275static void * 549static void *aio_proc(void *arg);
550
551static void start_thread (void)
552{
553 worker *wrk = calloc (1, sizeof (worker));
554
555 if (!wrk)
556 croak ("unable to allocate worker thread data");
557
558 sigset_t fullsigset, oldsigset;
559 pthread_attr_t attr;
560
561 pthread_attr_init (&attr);
562 pthread_attr_setstacksize (&attr, STACKSIZE);
563 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
564
565 sigfillset (&fullsigset);
566
567 LOCK (wrklock);
568 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
569
570 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
571 {
572 wrk->prev = &wrk_first;
573 wrk->next = wrk_first.next;
574 wrk_first.next->prev = wrk;
575 wrk_first.next = wrk;
576 started++;
577 }
578 else
579 free (wrk);
580
581 sigprocmask (SIG_SETMASK, &oldsigset, 0);
582 UNLOCK (wrklock);
583}
584
585static void req_send (aio_req req)
586{
587 while (started < wanted && nreqs >= started)
588 start_thread ();
589
590 ++nreqs;
591
592 LOCK (reqlock);
593 reqq_push (&req_queue, req);
594 pthread_cond_signal (&reqwait);
595 UNLOCK (reqlock);
596
597 if (nreqs > max_outstanding)
598 for (;;)
599 {
600 poll_cb ();
601
602 if (nreqs <= max_outstanding)
603 break;
604
605 poll_wait ();
606 }
607}
608
609static void end_thread (void)
610{
611 aio_req req;
612
613 Newz (0, req, 1, aio_cb);
614
615 req->type = REQ_QUIT;
616 req->pri = PRI_MAX + PRI_BIAS;
617
618 req_send (req);
619}
620
621static void min_parallel (int nthreads)
622{
623 if (wanted < nthreads)
624 wanted = nthreads;
625}
626
627static void max_parallel (int nthreads)
628{
629 int cur = started;
630
631 if (wanted > nthreads)
632 wanted = nthreads;
633
634 while (cur > wanted)
635 {
636 end_thread ();
637 cur--;
638 }
639
640 while (started > wanted)
641 {
642 poll_wait ();
643 poll_cb ();
644 }
645}
646
647static void create_pipe ()
648{
649 if (pipe (respipe))
650 croak ("unable to initialize result pipe");
651
652 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
653 croak ("cannot set result pipe to nonblocking mode");
654
655 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
656 croak ("cannot set result pipe to nonblocking mode");
657}
658
659/*****************************************************************************/
660/* work around various missing functions */
661
662#if !HAVE_PREADWRITE
663# define pread aio_pread
664# define pwrite aio_pwrite
665
666/*
667 * make our pread/pwrite safe against themselves, but not against
668 * normal read/write by using a mutex. slows down execution a lot,
669 * but that's your problem, not mine.
670 */
671static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
672
673static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
674{
675 ssize_t res;
676 off_t ooffset;
677
678 LOCK (preadwritelock);
679 ooffset = lseek (fd, 0, SEEK_CUR);
680 lseek (fd, offset, SEEK_SET);
681 res = read (fd, buf, count);
682 lseek (fd, ooffset, SEEK_SET);
683 UNLOCK (preadwritelock);
684
685 return res;
686}
687
688static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
689{
690 ssize_t res;
691 off_t ooffset;
692
693 LOCK (preadwritelock);
694 ooffset = lseek (fd, 0, SEEK_CUR);
695 lseek (fd, offset, SEEK_SET);
696 res = write (fd, buf, count);
697 lseek (fd, offset, SEEK_SET);
698 UNLOCK (preadwritelock);
699
700 return res;
701}
702#endif
703
704#if !HAVE_FDATASYNC
705# define fdatasync fsync
706#endif
707
708#if !HAVE_READAHEAD
709# define readahead aio_readahead
710
711static ssize_t readahead (int fd, off_t offset, size_t count)
712{
713 dBUF;
714
715 while (count > 0)
716 {
717 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
718
719 pread (fd, aio_buf, len, offset);
720 offset += len;
721 count -= len;
722 }
723
724 errno = 0;
725}
726#endif
727
728#if !HAVE_READDIR_R
729# define readdir_r aio_readdir_r
730
731static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
732
733static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
734{
735 struct dirent *e;
736 int errorno;
737
738 LOCK (readdirlock);
739
740 e = readdir (dirp);
741 errorno = errno;
742
743 if (e)
744 {
745 *res = ent;
746 strcpy (ent->d_name, e->d_name);
747 }
748 else
749 *res = 0;
750
751 UNLOCK (readdirlock);
752
753 errno = errorno;
754 return e ? 0 : -1;
755}
756#endif
757
758/* sendfile always needs emulation */
759static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
760{
761 ssize_t res;
762
763 if (!count)
764 return 0;
765
766#if HAVE_SENDFILE
767# if __linux
768 res = sendfile (ofd, ifd, &offset, count);
769
770# elif __freebsd
771 /*
772 * Of course, the freebsd sendfile is a dire hack with no thoughts
773 * wasted on making it similar to other I/O functions.
774 */
775 {
776 off_t sbytes;
777 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
778
779 if (res < 0 && sbytes)
780 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
781 res = sbytes;
782 }
783
784# elif __hpux
785 res = sendfile (ofd, ifd, offset, count, 0, 0);
786
787# elif __solaris
788 {
789 struct sendfilevec vec;
790 size_t sbytes;
791
792 vec.sfv_fd = ifd;
793 vec.sfv_flag = 0;
794 vec.sfv_off = offset;
795 vec.sfv_len = count;
796
797 res = sendfilev (ofd, &vec, 1, &sbytes);
798
799 if (res < 0 && sbytes)
800 res = sbytes;
801 }
802
803# endif
804#else
805 res = -1;
806 errno = ENOSYS;
807#endif
808
809 if (res < 0
810 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
811#if __solaris
812 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
813#endif
814 )
815 )
816 {
817 /* emulate sendfile. this is a major pain in the ass */
818 dBUF;
819
820 res = 0;
821
822 while (count)
823 {
824 ssize_t cnt;
825
826 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
827
828 if (cnt <= 0)
829 {
830 if (cnt && !res) res = -1;
831 break;
832 }
833
834 cnt = write (ofd, aio_buf, cnt);
835
836 if (cnt <= 0)
837 {
838 if (cnt && !res) res = -1;
839 break;
840 }
841
842 offset += cnt;
843 res += cnt;
844 count -= cnt;
845 }
846 }
847
848 return res;
849}
850
851/* read a full directory */
852static void scandir_ (aio_req req, worker *self)
853{
854 DIR *dirp;
855 union
856 {
857 struct dirent d;
858 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
859 } *u;
860 struct dirent *entp;
861 char *name, *names;
862 int memlen = 4096;
863 int memofs = 0;
864 int res = 0;
865 int errorno;
866
867 LOCK (wrklock);
868 self->dirp = dirp = opendir (req->dataptr);
869 self->dbuf = u = malloc (sizeof (*u));
870 UNLOCK (wrklock);
871
872 req->data2ptr = names = malloc (memlen);
873
874 if (dirp && u && names)
875 for (;;)
876 {
877 errno = 0;
878 readdir_r (dirp, &u->d, &entp);
879
880 if (!entp)
881 break;
882
883 name = entp->d_name;
884
885 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
886 {
887 int len = strlen (name) + 1;
888
889 res++;
890
891 while (memofs + len > memlen)
892 {
893 memlen *= 2;
894 LOCK (wrklock);
895 req->data2ptr = names = realloc (names, memlen);
896 UNLOCK (wrklock);
897
898 if (!names)
899 break;
900 }
901
902 memcpy (names + memofs, name, len);
903 memofs += len;
904 }
905 }
906
907 if (errno)
908 res = -1;
909
910 req->result = res;
911}
912
913/*****************************************************************************/
914
276aio_proc (void *thr_arg) 915static void *aio_proc (void *thr_arg)
277{ 916{
278 aio_req req; 917 aio_req req;
279 int type; 918 int type;
919 worker *self = (worker *)thr_arg;
280 920
281 do 921 do
282 { 922 {
283 pthread_mutex_lock (&reqlock); 923 LOCK (reqlock);
284 924
285 for (;;) 925 for (;;)
286 { 926 {
287 req = reqs; 927 self->req = req = reqq_shift (&req_queue);
288
289 if (reqs)
290 {
291 reqs = reqs->next;
292 if (!reqs) reqe = 0;
293 }
294 928
295 if (req) 929 if (req)
296 break; 930 break;
297 931
298 pthread_cond_wait (&reqwait, &reqlock); 932 pthread_cond_wait (&reqwait, &reqlock);
299 } 933 }
300 934
301 pthread_mutex_unlock (&reqlock); 935 UNLOCK (reqlock);
302 936
303 errno = 0; /* strictly unnecessary */ 937 errno = 0; /* strictly unnecessary */
938 type = req->type; /* remember type for QUIT check */
304 939
305 type = req->type; 940 if (!(req->flags & FLAG_CANCELLED))
306
307 switch (type) 941 switch (type)
308 { 942 {
309 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 943 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
310 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 944 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
311#if SYS_readahead 945
312 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 946 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
313#else 947 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
314 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
315#endif
316 948
317 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 949 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
318 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 950 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
319 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 951 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
320 952
321 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 953 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
322 case REQ_CLOSE: req->result = close (req->fd); break; 954 case REQ_CLOSE: req->result = close (req->fd); break;
323 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 955 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
324
325 case REQ_FSYNC: req->result = fsync (req->fd); break; 956 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
957 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
958 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
959 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
960
326 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 961 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
962 case REQ_FSYNC: req->result = fsync (req->fd); break;
963 case REQ_READDIR: scandir_ (req, self); break;
327 964
965 case REQ_BUSY:
966 {
967 struct timeval tv;
968
969 tv.tv_sec = req->fd;
970 tv.tv_usec = req->fd2;
971
972 req->result = select (0, 0, 0, 0, &tv);
973 }
974
975 case REQ_GROUP:
976 case REQ_NOP:
328 case REQ_QUIT: 977 case REQ_QUIT:
329 break; 978 break;
330 979
331 default: 980 default:
332 req->result = ENOSYS; 981 req->result = ENOSYS;
333 break; 982 break;
334 } 983 }
335 984
336 req->errorno = errno; 985 req->errorno = errno;
337 986
338 pthread_mutex_lock (&reslock); 987 LOCK (reslock);
339 988
340 req->next = 0; 989 if (!reqq_push (&res_queue, req))
341
342 if (rese)
343 {
344 rese->next = req;
345 rese = req;
346 }
347 else
348 {
349 rese = ress = req;
350
351 /* write a dummy byte to the pipe so fh becomes ready */ 990 /* write a dummy byte to the pipe so fh becomes ready */
352 write (respipe [1], &respipe, 1); 991 write (respipe [1], &respipe, 1);
353 }
354 992
355 pthread_mutex_unlock (&reslock); 993 self->req = 0;
994 worker_clear (self);
995
996 UNLOCK (reslock);
356 } 997 }
357 while (type != REQ_QUIT); 998 while (type != REQ_QUIT);
358 999
1000 LOCK (wrklock);
1001 worker_free (self);
1002 UNLOCK (wrklock);
1003
359 return 0; 1004 return 0;
360} 1005}
361 1006
1007/*****************************************************************************/
1008
1009static void atfork_prepare (void)
1010{
1011 LOCK (wrklock);
1012 LOCK (reqlock);
1013 LOCK (reslock);
1014#if !HAVE_PREADWRITE
1015 LOCK (preadwritelock);
1016#endif
1017#if !HAVE_READDIR_R
1018 LOCK (readdirlock);
1019#endif
1020}
1021
1022static void atfork_parent (void)
1023{
1024#if !HAVE_READDIR_R
1025 UNLOCK (readdirlock);
1026#endif
1027#if !HAVE_PREADWRITE
1028 UNLOCK (preadwritelock);
1029#endif
1030 UNLOCK (reslock);
1031 UNLOCK (reqlock);
1032 UNLOCK (wrklock);
1033}
1034
1035static void atfork_child (void)
1036{
1037 aio_req prv;
1038
1039 while (prv = reqq_shift (&req_queue))
1040 req_free (prv);
1041
1042 while (prv = reqq_shift (&res_queue))
1043 req_free (prv);
1044
1045 while (wrk_first.next != &wrk_first)
1046 {
1047 worker *wrk = wrk_first.next;
1048
1049 if (wrk->req)
1050 req_free (wrk->req);
1051
1052 worker_clear (wrk);
1053 worker_free (wrk);
1054 }
1055
1056 started = 0;
1057 nreqs = 0;
1058
1059 close (respipe [0]);
1060 close (respipe [1]);
1061 create_pipe ();
1062
1063 atfork_parent ();
1064}
1065
1066#define dREQ \
1067 aio_req req; \
1068 int req_pri = next_pri; \
1069 next_pri = DEFAULT_PRI + PRI_BIAS; \
1070 \
1071 if (SvOK (callback) && !SvROK (callback)) \
1072 croak ("callback must be undef or of reference type"); \
1073 \
1074 Newz (0, req, 1, aio_cb); \
1075 if (!req) \
1076 croak ("out of memory during aio_req allocation"); \
1077 \
1078 req->callback = newSVsv (callback); \
1079 req->pri = req_pri
1080
1081#define REQ_SEND \
1082 req_send (req); \
1083 \
1084 if (GIMME_V != G_VOID) \
1085 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1086
362MODULE = IO::AIO PACKAGE = IO::AIO 1087MODULE = IO::AIO PACKAGE = IO::AIO
363 1088
1089PROTOTYPES: ENABLE
1090
364BOOT: 1091BOOT:
365{ 1092{
366 if (pipe (respipe)) 1093 HV *stash = gv_stashpv ("IO::AIO", 1);
367 croak ("unable to initialize result pipe"); 1094 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1095 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1096 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
368 1097
369 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1098 create_pipe ();
370 croak ("cannot set result pipe to nonblocking mode"); 1099 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
371
372 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
373 croak ("cannot set result pipe to nonblocking mode");
374} 1100}
375 1101
376void 1102void
377min_parallel(nthreads) 1103min_parallel (nthreads)
378 int nthreads 1104 int nthreads
379 PROTOTYPE: $ 1105 PROTOTYPE: $
380 CODE:
381 while (nthreads > started)
382 start_thread ();
383 1106
384void 1107void
385max_parallel(nthreads) 1108max_parallel (nthreads)
386 int nthreads 1109 int nthreads
387 PROTOTYPE: $ 1110 PROTOTYPE: $
1111
1112int
1113max_outstanding (nreqs)
1114 int nreqs
1115 PROTOTYPE: $
388 CODE: 1116 CODE:
389{ 1117 RETVAL = max_outstanding;
390 int cur = started; 1118 max_outstanding = nreqs;
391 while (cur > nthreads)
392 {
393 end_thread ();
394 cur--;
395 }
396 1119
397 while (started > nthreads)
398 {
399 poll_wait ();
400 poll_cb (aTHX);
401 }
402}
403
404void 1120void
405aio_open(pathname,flags,mode,callback) 1121aio_open (pathname,flags,mode,callback=&PL_sv_undef)
406 SV * pathname 1122 SV * pathname
407 int flags 1123 int flags
408 int mode 1124 int mode
409 SV * callback 1125 SV * callback
410 PROTOTYPE: $$$$ 1126 PROTOTYPE: $$$;$
411 CODE: 1127 PPCODE:
412{ 1128{
413 aio_req req; 1129 dREQ;
414
415 Newz (0, req, 1, aio_cb);
416
417 if (!req)
418 croak ("out of memory during aio_req allocation");
419 1130
420 req->type = REQ_OPEN; 1131 req->type = REQ_OPEN;
421 req->data = newSVsv (pathname); 1132 req->data = newSVsv (pathname);
422 req->dataptr = SvPV_nolen (req->data); 1133 req->dataptr = SvPVbyte_nolen (req->data);
423 req->fd = flags; 1134 req->fd = flags;
424 req->mode = mode; 1135 req->mode = mode;
425 req->callback = SvREFCNT_inc (callback);
426 1136
427 send_req (req); 1137 REQ_SEND;
428} 1138}
429 1139
430void 1140void
431aio_close(fh,callback) 1141aio_close (fh,callback=&PL_sv_undef)
432 InputStream fh 1142 SV * fh
433 SV * callback 1143 SV * callback
434 PROTOTYPE: $$ 1144 PROTOTYPE: $;$
435 ALIAS: 1145 ALIAS:
436 aio_close = REQ_CLOSE 1146 aio_close = REQ_CLOSE
437 aio_fsync = REQ_FSYNC 1147 aio_fsync = REQ_FSYNC
438 aio_fdatasync = REQ_FDATASYNC 1148 aio_fdatasync = REQ_FDATASYNC
439 CODE: 1149 PPCODE:
1150{
1151 dREQ;
1152
1153 req->type = ix;
1154 req->fh = newSVsv (fh);
1155 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1156
1157 REQ_SEND (req);
1158}
1159
1160void
1161aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1162 SV * fh
1163 UV offset
1164 UV length
1165 SV * data
1166 UV dataoffset
1167 SV * callback
1168 ALIAS:
1169 aio_read = REQ_READ
1170 aio_write = REQ_WRITE
1171 PROTOTYPE: $$$$$;$
1172 PPCODE:
440{ 1173{
441 aio_req req; 1174 aio_req req;
1175 STRLEN svlen;
1176 char *svptr = SvPVbyte (data, svlen);
442 1177
443 Newz (0, req, 1, aio_cb); 1178 SvUPGRADE (data, SVt_PV);
1179 SvPOK_on (data);
444 1180
445 if (!req) 1181 if (dataoffset < 0)
446 croak ("out of memory during aio_req allocation"); 1182 dataoffset += svlen;
447 1183
448 req->type = ix; 1184 if (dataoffset < 0 || dataoffset > svlen)
449 req->fd = PerlIO_fileno (fh); 1185 croak ("data offset outside of string");
450 req->callback = SvREFCNT_inc (callback);
451 1186
452 send_req (req); 1187 if (ix == REQ_WRITE)
453} 1188 {
454 1189 /* write: check length and adjust. */
455void 1190 if (length < 0 || length + dataoffset > svlen)
456aio_read(fh,offset,length,data,dataoffset,callback) 1191 length = svlen - dataoffset;
457 InputStream fh 1192 }
458 UV offset 1193 else
459 IV length 1194 {
460 SV * data 1195 /* read: grow scalar as necessary */
461 IV dataoffset 1196 svptr = SvGROW (data, length + dataoffset);
462 SV * callback 1197 }
463 PROTOTYPE: $$$$$$
464 CODE:
465 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
466
467void
468aio_write(fh,offset,length,data,dataoffset,callback)
469 OutputStream fh
470 UV offset
471 IV length
472 SV * data
473 IV dataoffset
474 SV * callback
475 PROTOTYPE: $$$$$$
476 CODE:
477 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
478
479void
480aio_readahead(fh,offset,length,callback)
481 InputStream fh
482 UV offset
483 IV length
484 SV * callback
485 PROTOTYPE: $$$$
486 CODE:
487{
488 aio_req req;
489 1198
490 if (length < 0) 1199 if (length < 0)
491 croak ("length must not be negative"); 1200 croak ("length must not be negative");
492 1201
493 Newz (0, req, 1, aio_cb); 1202 {
1203 dREQ;
494 1204
495 if (!req) 1205 req->type = ix;
496 croak ("out of memory during aio_req allocation"); 1206 req->fh = newSVsv (fh);
1207 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1208 : IoOFP (sv_2io (fh)));
1209 req->offset = offset;
1210 req->length = length;
1211 req->data = SvREFCNT_inc (data);
1212 req->dataptr = (char *)svptr + dataoffset;
1213
1214 if (!SvREADONLY (data))
1215 {
1216 SvREADONLY_on (data);
1217 req->data2ptr = (void *)data;
1218 }
1219
1220 REQ_SEND;
1221 }
1222}
1223
1224void
1225aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1226 SV * out_fh
1227 SV * in_fh
1228 UV in_offset
1229 UV length
1230 SV * callback
1231 PROTOTYPE: $$$$;$
1232 PPCODE:
1233{
1234 dREQ;
1235
1236 req->type = REQ_SENDFILE;
1237 req->fh = newSVsv (out_fh);
1238 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1239 req->fh2 = newSVsv (in_fh);
1240 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1241 req->offset = in_offset;
1242 req->length = length;
1243
1244 REQ_SEND;
1245}
1246
1247void
1248aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1249 SV * fh
1250 UV offset
1251 IV length
1252 SV * callback
1253 PROTOTYPE: $$$;$
1254 PPCODE:
1255{
1256 dREQ;
497 1257
498 req->type = REQ_READAHEAD; 1258 req->type = REQ_READAHEAD;
1259 req->fh = newSVsv (fh);
499 req->fd = PerlIO_fileno (fh); 1260 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
500 req->offset = offset; 1261 req->offset = offset;
501 req->length = length; 1262 req->length = length;
502 req->callback = SvREFCNT_inc (callback);
503 1263
504 send_req (req); 1264 REQ_SEND;
505} 1265}
506 1266
507void 1267void
508aio_stat(fh_or_path,callback) 1268aio_stat (fh_or_path,callback=&PL_sv_undef)
509 SV * fh_or_path 1269 SV * fh_or_path
510 SV * callback 1270 SV * callback
511 PROTOTYPE: $$
512 ALIAS: 1271 ALIAS:
1272 aio_stat = REQ_STAT
513 aio_lstat = 1 1273 aio_lstat = REQ_LSTAT
514 CODE: 1274 PPCODE:
515{ 1275{
516 aio_req req; 1276 dREQ;
517
518 Newz (0, req, 1, aio_cb);
519
520 if (!req)
521 croak ("out of memory during aio_req allocation");
522 1277
523 New (0, req->statdata, 1, Stat_t); 1278 New (0, req->statdata, 1, Stat_t);
524
525 if (!req->statdata) 1279 if (!req->statdata)
1280 {
1281 req_free (req);
526 croak ("out of memory during aio_req->statdata allocation"); 1282 croak ("out of memory during aio_req->statdata allocation");
1283 }
527 1284
528 if (SvPOK (fh_or_path)) 1285 if (SvPOK (fh_or_path))
529 { 1286 {
530 req->type = ix ? REQ_LSTAT : REQ_STAT; 1287 req->type = ix;
531 req->data = newSVsv (fh_or_path); 1288 req->data = newSVsv (fh_or_path);
532 req->dataptr = SvPV_nolen (req->data); 1289 req->dataptr = SvPVbyte_nolen (req->data);
533 } 1290 }
534 else 1291 else
535 { 1292 {
536 req->type = REQ_FSTAT; 1293 req->type = REQ_FSTAT;
1294 req->fh = newSVsv (fh_or_path);
537 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1295 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
538 } 1296 }
539 1297
540 req->callback = SvREFCNT_inc (callback); 1298 REQ_SEND;
541
542 send_req (req);
543} 1299}
544 1300
545void 1301void
546aio_unlink(pathname,callback) 1302aio_unlink (pathname,callback=&PL_sv_undef)
547 SV * pathname 1303 SV * pathname
548 SV * callback 1304 SV * callback
1305 ALIAS:
1306 aio_unlink = REQ_UNLINK
1307 aio_rmdir = REQ_RMDIR
1308 aio_readdir = REQ_READDIR
1309 PPCODE:
1310{
1311 dREQ;
1312
1313 req->type = ix;
1314 req->data = newSVsv (pathname);
1315 req->dataptr = SvPVbyte_nolen (req->data);
1316
1317 REQ_SEND;
1318}
1319
1320void
1321aio_link (oldpath,newpath,callback=&PL_sv_undef)
1322 SV * oldpath
1323 SV * newpath
1324 SV * callback
1325 ALIAS:
1326 aio_link = REQ_LINK
1327 aio_symlink = REQ_SYMLINK
1328 aio_rename = REQ_RENAME
1329 PPCODE:
1330{
1331 dREQ;
1332
1333 req->type = ix;
1334 req->fh = newSVsv (oldpath);
1335 req->data2ptr = SvPVbyte_nolen (req->fh);
1336 req->data = newSVsv (newpath);
1337 req->dataptr = SvPVbyte_nolen (req->data);
1338
1339 REQ_SEND;
1340}
1341
1342void
1343aio_busy (delay,callback=&PL_sv_undef)
1344 double delay
1345 SV * callback
1346 PPCODE:
1347{
1348 dREQ;
1349
1350 req->type = REQ_BUSY;
1351 req->fd = delay < 0. ? 0 : delay;
1352 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1353
1354 REQ_SEND;
1355}
1356
1357void
1358aio_group (callback=&PL_sv_undef)
1359 SV * callback
549 PROTOTYPE: $$ 1360 PROTOTYPE: ;$
1361 PPCODE:
1362{
1363 dREQ;
1364
1365 req->type = REQ_GROUP;
1366 req_send (req);
1367
1368 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1369}
1370
1371void
1372aio_nop (callback=&PL_sv_undef)
1373 SV * callback
1374 PPCODE:
1375{
1376 dREQ;
1377
1378 req->type = REQ_NOP;
1379
1380 REQ_SEND;
1381}
1382
1383void
1384aioreq_pri (int pri = DEFAULT_PRI)
1385 CODE:
1386 if (pri < PRI_MIN) pri = PRI_MIN;
1387 if (pri > PRI_MAX) pri = PRI_MAX;
1388 next_pri = pri + PRI_BIAS;
1389
1390void
1391aioreq_nice (int nice = 0)
1392 CODE:
1393 nice = next_pri - nice;
1394 if (nice < PRI_MIN) nice = PRI_MIN;
1395 if (nice > PRI_MAX) nice = PRI_MAX;
1396 next_pri = nice + PRI_BIAS;
1397
1398void
1399flush ()
1400 PROTOTYPE:
550 CODE: 1401 CODE:
551{ 1402 while (nreqs)
552 aio_req req; 1403 {
553 1404 poll_wait ();
554 Newz (0, req, 1, aio_cb); 1405 poll_cb ();
555 1406 }
556 if (!req) 1407
557 croak ("out of memory during aio_req allocation"); 1408void
558 1409poll()
559 req->type = REQ_UNLINK; 1410 PROTOTYPE:
560 req->data = newSVsv (pathname); 1411 CODE:
561 req->dataptr = SvPV_nolen (req->data); 1412 if (nreqs)
562 req->callback = SvREFCNT_inc (callback); 1413 {
563 1414 poll_wait ();
564 send_req (req); 1415 poll_cb ();
565} 1416 }
566 1417
567int 1418int
568poll_fileno() 1419poll_fileno()
569 PROTOTYPE: 1420 PROTOTYPE:
570 CODE: 1421 CODE:
… …
574 1425
575int 1426int
576poll_cb(...) 1427poll_cb(...)
577 PROTOTYPE: 1428 PROTOTYPE:
578 CODE: 1429 CODE:
579 RETVAL = poll_cb (aTHX); 1430 RETVAL = poll_cb ();
580 OUTPUT: 1431 OUTPUT:
581 RETVAL 1432 RETVAL
582 1433
583void 1434void
584poll_wait() 1435poll_wait()
… …
593 CODE: 1444 CODE:
594 RETVAL = nreqs; 1445 RETVAL = nreqs;
595 OUTPUT: 1446 OUTPUT:
596 RETVAL 1447 RETVAL
597 1448
1449PROTOTYPES: DISABLE
1450
1451MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1452
1453void
1454cancel (aio_req_ornot req)
1455 CODE:
1456 req_cancel (req);
1457
1458void
1459cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1460 CODE:
1461 SvREFCNT_dec (req->callback);
1462 req->callback = newSVsv (callback);
1463
1464MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1465
1466void
1467add (aio_req grp, ...)
1468 PPCODE:
1469{
1470 int i;
1471 aio_req req;
1472
1473 if (grp->fd == 2)
1474 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1475
1476 for (i = 1; i < items; ++i )
1477 {
1478 if (GIMME_V != G_VOID)
1479 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1480
1481 req = SvAIO_REQ (ST (i));
1482
1483 if (req)
1484 {
1485 ++grp->length;
1486 req->grp = grp;
1487
1488 req->grp_prev = 0;
1489 req->grp_next = grp->grp_first;
1490
1491 if (grp->grp_first)
1492 grp->grp_first->grp_prev = req;
1493
1494 grp->grp_first = req;
1495 }
1496 }
1497}
1498
1499void
1500result (aio_req grp, ...)
1501 CODE:
1502{
1503 int i;
1504 AV *av = newAV ();
1505
1506 for (i = 1; i < items; ++i )
1507 av_push (av, newSVsv (ST (i)));
1508
1509 SvREFCNT_dec (grp->data);
1510 grp->data = (SV *)av;
1511}
1512
1513void
1514limit (aio_req grp, int limit)
1515 CODE:
1516 grp->fd2 = limit;
1517 aio_grp_feed (grp);
1518
1519void
1520feed (aio_req grp, SV *callback=&PL_sv_undef)
1521 CODE:
1522{
1523 SvREFCNT_dec (grp->fh2);
1524 grp->fh2 = newSVsv (callback);
1525
1526 if (grp->fd2 <= 0)
1527 grp->fd2 = 2;
1528
1529 aio_grp_feed (grp);
1530}
1531

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